Joint Event and Temporal Relation Extraction

The Sixth Informatics for Integrating Biology and the Bedside (i2b2) Natural Language Processing Challenge for Clinical Records focused on the temporal relations in clinical narratives. The organizers provided the research community with a corpus of discharge summaries annotated with temporal information, to be used for the development and evaluation of temporal reasoning systems. 18 teams from around the world participated in the challenge. During the workshop, participating teams presented comprehensive reviews and analysis of their systems, and outlined future research directions suggested by the challenge contributions.

TimeBankPT is a corpus of Portuguese text with annotations about time. The annotation scheme used is similar to TimeML. TimeBankPT is the result of adapting the English corpus used in the first TempEval challenge to the Portuguese language. In what regards the temporal relaiton type, the corpus was annotated with six labels, namely: BEFORE, AFTER, OVERLAP, BEFORE-OR-OVERLAP, OVERLAP-OR-AFTER and VAGUE. | | Train | Test | |-----------|-------|------| | Documents | 162 | 20 | | Sentences | 2281 | 351 | | Words | 60782 | 8920 | | Events | 6790 | 1097 | | Timexs | 1244 | 165 | | Tlinks | 5781 | 758 |

Spanish TimeBank 1.0 was developed by researchers at Barcelona Media and consists of Spanish texts in the AnCora corpus annotated with temporal and event information according to the TimeML specification language. TimeML is a schema for annotating eventualities and time expressions in natural language as well as the temporal relations among them, thus facilitating the task of extraction, representation and exchange of temporal information. Spanish Timebank 1.0 is annotated in three levels, marking events, time expressions and event metadata. The TimeML annotation scheme was tailored for the specifics of the Spanish language. Temporal relations in Spanish present distinctions of verbal mood (e.g., indicative, subjunctive, conditional, etc.) and grammatical aspect (e.g., imperfective) which are absent in English. Spanish TimeBank 1.0 joins the family of TimeBank annotated corpora which includes languages such as English, Italian, French, Korean and Chinese. Through their common layer of annotation, these corpora provide resources useful for multilingual temporal extraction and processing, such as multilingual text entailment, opinion mining or question answering. Spanish Timebank 1.0 is the Spanish language complement to Catalan Timebank 1.0 LDC2012T10.